The Book of Wills
30/8. Chapter:
The Virtue Of Charity Given On Behalf Of The Deceased
Sunan an-Nasai
أَخْبَرَنَا الْحُسَيْنُ بْنُ عِيسَى، قَالَ أَنْبَأَنَا سُفْيَانُ، عَنْ عَمْرٍو، عَنْ عِكْرِمَةَ، عَنِ ابْنِ عَبَّاسٍ، أَنَّ سَعْدًا، سَأَلَ النَّبِيَّ صلى الله عليه وسلم إِنَّ أُمِّي مَاتَتْ وَلَمْ تُوصِ أَفَأَتَصَدَّقُ عَنْهَا قَالَ " نَعَمْ ".
It was narrated from Ibn 'Abbas that Sa'd asked the Prophet: "My mother died and did not leave a will; shall I give charity on her behalf?" He said: "Yes."
Reference : Sunan an-Nasa'i 3654In-book reference : Book 30, Hadith 44English translation : Vol. 4, Book 30, Hadith 3684